Recent content by jescriba

I see... Well, then my circuit would have to test incoming ratios with a delayed ratio to trigger the switch? And how would I test the ratio some sort of op amp dividing configuration or divider IC? For the high pass filter, would I be able to neglect the changes in amplitude if its comparing...

Thanks for all the responses. So, I'm doing this with an audio signal. I might be able to use an IC if the task is too difficult to do without ICs. Why could I not use a RC filter for frequency to voltage converter and put that through a not gate or some sort of interval comparator setup. I'm...

Thanks for the response. I'm trying to build this as part of a project for an analog electronics course so I can't use any microprocessors :/ But I am trying to do this for audio frequencies. I'll look into how the Picaxe series works to see if I get a better idea of how I could achieve this in...

I'm trying to build a switch that is closed only when the input signal is roughly the same signal over some time. So when ever the frequency of the input changes by a significant amount the switch opens, and when the input frequency is roughly constant the switch is closed. I'm building this in...

This should work. I can multiply my frequency by even integers by using the identity sin(2x)=2sinxcosx. So put the input signal (sine) through a differentiator and then through a multiplier (giving sinxcosx) and then through an op amp with designed gain of 2 giving 2sinxcosx=sin(2x). Now, I'm...

Sorry if I didn't explain myself well enough. Essentially, I want a guitar effect pedal that is a harmonizer. Which is to say, a circuit that takes the guitar signal and produces its harmonics (integer multiplies/octaves) to merge with the original signal to give a chord of octaves for the note...

Thanks for all the responses. I feared that I would not be able to preserve the waveform by a simple analog circuit. Does the distortion of the harmonics from the originally signal produce a very flat undesirable tone? How about just making a integer multiplier with a VCO that puts out a...

I'm trying to build a frequency multiplier that will take an input signal in the acoustic range (from a guitar) and multiply its frequency by an integer value (play harmonics of the input). I was wondering how I could do this in analog. I have been looking into trying to use some sort of voltage...